Near average autumn for Perth

Rainfall
- near average: This autumn, the rainfall in Perth was near average.
From March to May, Perth received 144.0 mm over 24 days compared with the average
of 182 mm over about 23 days. Last autumn, Perth recorded 61.0 mm over 19 days.
Rainfall totals for individual months this autumn were: March 6.2 mm (average
20 mm), April 76.2 mm (average 43 mm) and May 61.4 mm (average 119 mm). The wettest
day was on 16 April 2007 when 40.4 mm of rain was recorded.

Mean daily
maximum temperature - near average: The mean daily maximum temperature
for Perth this autumn of 25.5°C was close to the average of 25.8°C. Daily
values this autumn ranged from a mild 17.1°C on 28 May to a very hot 42.4°C
on 7 March, the hottest autumn day on record for Perth. Last autumn the mean daily
maximum temperature was 25.3°C.

Mean daily minimum temperature
- near average: The mean daily minimum temperature for Perth this autumn
was 12.9°C, compared to the average of 13.7°C. Daily minima ranged from
a cold 3.8°C on 22 May to a warm 23.6°C on 6 March. Last autumn the mean
daily minimum temperature was 12.4°C.

Autumn mean temperature and
sunshine

Element

Autumn 2007

Long- term Average

Highest

Year

Lowest

Year

Records Commence

Maximum Temperature
(°C)

25.5

25.8

27.2

1978

22.3

1917

1897

Minimum Temperature (°C)

12.9

13.7

16.6

1988

12.1

1960

1897

Sunshine
(hours per day)

8.6

8.1

8.8

1972

6.0

1926

1898

Autumn rainfall and rain days

Element

Autumn 2007

Long-term
Average

Highest

Year

Lowest

Year

Records
Commence

Rainfall
(mm)

144.0

182

372.4

1879

42.4

1983

1876

Rain days

24

23.3

42

1926

10

1886

1876

Autumn daily extremes

Element

Summer 2006/07

Date

Extreme

Date

Records Commence

Highest
daily maximum (°C)

42.4

07/03/2007

42.3

05/05/1990

1897

Lowest daily
maximum (°C)

17.1

28/05/2007

11.5

23/05/1995

1897

Highest
daily minimum (°C)

23.6

06/03/2007

28.3

02/03/1934

1897

Lowest daily
minimum (°C)

3.8

22/05/2007

1.3

11/05/1914

1897

Wettest
24 hours to 9am (mm)

40.4

16/04/2007

77.0

09/03/1934

1876

Past autumns in Perth
1994−2007

Season

Mean Maximum (°C)

Mean
Minimum (°C)

Total Rainfall (mm)

Rain Days

Mean Sunshine (hours)

1994

26.7

13.8

101.4

16

8.7

1995

25.6

13.1

169.4

22

8.4

1996

25.6

13.1

86.8

23

8.2

1997

24.6

14.1

175.0

27

7.5

1998

26.4

14.4

151.6

28

7.8

1999

25.9

14.9

158.4

25

7.8

2000

25.6

12.9

81.2

16

8.5

2001

25.7

13.3

118.8

21

8.2

2002

25.6

13.6

169.0

33

8.1

2003

26.6

14.6

203.0

28

8.0

2004

25.7

13.1

115.2

18

8.5

2005

26.2

14.9

271.2

32

7.2

2006

25.3

12.4

61.0

19

8.6

2007

25.5

12.9

144.0

24

8.6

Note: Official Perth observations have been recorded
at several different sites with varying instrumentation over the years, and these
changes can affect the continuity of the climate record. For the current Perth
(Mount Lawley) site, the most significant changes of this kind relate to temperature
and rain days. For that reason, current mean temperature and rain-day data quoted
here are based only on readings from the Perth (Mount Lawley) site, which commenced
observations in 1993. Sunshine recordings are from Perth Airport and for similar
reasons current means use only Perth Airport data, which commenced in 1993.